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Current Recommendations are Too Low

Our vitamin D myth busting series continues with one of the most important-to-address myths about vitamin D – that the current recommended daily allowance (RDA) of 600 IU per day, from all sources, and...

Sunlight and Health: by Marc Sorenson, EdD

Sunlight and health, from the earliest human civilizations to our current battle with COVID-19, have an inseparable link. Dr. John Fielder’s exceptionally well-written paper, History of Heliotherapy provides insight into the past. Many ancients...

Does Sunlight Have a Role in Immune Health?

In our last post, we discussed a paper by Drs. Grant and Giovannucci on the 1918-1919 Influenza pandemic, highlighting the relationship between northern latitude and UVB, and incidence of pneumonia and case fatalities due...